When connecting VSP One B20 series storage systems to VSP 5000 series or connecting VSP One B85 storage systems to storage systems other than VSP One B85 and creating pairs, the following restrictions on LU numbers and namespace IDs apply.
- LU numbers
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(VSP One B20 series) A pair can be assigned LU numbers from 0 to 4095 in VSP 5000 series with DKCMAIN microcode version 90-02-0x-xx/xx or later. However, do not create a pair between LUs 2048 to 4095 on VSP 5000 series (as the source) with DKCMAIN microcode version 90-02-0x-xx/xx or later and LUs on VSP One B20 series storage system because failures such as pair suspension might occur on the VSP One B20 series. Because of this restriction, you are limited to assigning 2048 LU numbers (0 to 2047).
(VSP One B85) A pair can be assigned LU numbers from 0 to 4095 in VSP One B85. However, if you connect VSP One B85 to a storage system that does not support assignment of LU numbers 0 to 4095, do not create a pair using LUs with LU numbers 2048 to 4095 on the VSP One B85 storage system. If you do, failures, such as pair suspension, might occur on the target storage system.
When you configure a host group for Fibre Channel ports, you can configure up to 2048 LU paths for VSP One B20 series or 4096 LU paths for VSP One B85 in a single host group. You can also configure up to 2048 LU paths for VSP One B20 series or 4096 LU paths for VSP One B85 on a single port through a host group.
When you configure iSCSI targets on iSCSI ports, you can set up to 2048 LU paths for VSP One B20 series or 4096 LU paths for VSP One B85 on a single iSCSI target. You can also configure up to 2048 LU paths for VSP One B20 series or 4096 LU paths for VSP One B85 on a single port through iSCSI targets.
(VSP One B20 series) The following table lists the LU numbers that can be used when the source storage system is VSP One B20 series and the target storage system is VSP One B20 series, VSP 5000 series, VSP E series, or VSP G130, G/F350, G/F370, G/F700, G/F900.
Source storage system Target storage system Restrictions Model Firmware version LU number that allows pair creation Number of LU paths that can be configured on one port VSP One B20 series (all versions) VSP G130, G/F350, G/F370, G/F700, G/F900 88-08-12-xx/xx or later 0 to 2047 0 to 2048 VSP E series 93-07-22-xx/xx or later 0 to 2047 0 to 2048 VSP 5000 series 90-09-23-xx/xx or later 0 to 2047 0 to 2048 VSP One B20 series All versions 0 to 2047 0 to 2048 (VSP One B85) The following table lists the LU numbers that can be used when the source storage system is VSP One B85.
(VSP One B85) Restrictions on LU numbers when creating pairs.
Source storage system Target storage system Restrictions Model Firmware version LU number that allows pair creation Number of LU paths that can be configured on one port VSP One B85 (A0-05-41-xx or later) VSP One B85 A0-05-41-xx or later 0 to 4095 0 to 4096 VSP 5000 series 90-09-31-xx 0 to 4095 0 to 4096 - Namespace IDs
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(VSP One B20 series) Namespace ID restrictions when creating pairs are similar to the restrictions on LU numbers. VSP 5000 series can assign namespace IDs from 1 to 4096. However, when connecting VSP One B20 series to VSP 5000 series, do not create pairs using namespace with a namespace ID of 2049 to 4096. As mentioned above, the storage system might experience failures such as pair suspension.
(VSP One B20 series) The following table lists namespace ID numbers that can be used when the source storage system is VSP One B20 series and the target storage system is VSP E1090, VSP 5000 series, or VSP One B20 series.
Source storage system Target storage system Restrictions Model Firmware version Namespace ID that allows pair creation Number of namespaces that can be created in the NVM subsystem VSP One B20 series (all versions) VSP E1090 93-07-22-xx/xx or later 1 to 2048 2048 VSP 5000 series 90-09-23-xx/xx or later 1 to 2048 2048 VSP One B20 series All versions 1 to 2048 2048 (VSP One B85) The following table lists namespace ID numbers that can be used when the source storage system is VSP One B85. Restrictions on namespace IDs when creating pairs.
Source storage system Target storage system Restrictions Model Firmware version Namespace ID that allows pair creation Number of namespaces that can be created in the NVM subsystem VSP One B85 (A0-05-41-xx or later) VSP One B85 A0-05-41-xx or later 1 to 4096 4096 VSP 5000 series 90-09-31-xx 1 to 4096 4096